module.exports = function grammar(){copyright: Copyright (c) 2023 Lowell D. Thomas, all rights reserved
license: BSD-2-Clause (https://opensource.org/licenses/BSD-2-Clause)
Generated by apg-js, Version 4.2.1 apg-js
module.exports = function grammar(){SUMMARY
rules = 5
udts = 0
opcodes = 20
--- ABNF original opcodes
ALT = 0
CAT = 4
REP = 3
RNM = 6
TLS = 6
TBS = 0
TRG = 0
--- SABNF superset opcodes
UDT = 0
AND = 1
NOT = 0
BKA = 0
BKN = 0
BKR = 0
ABG = 0
AEN = 0
characters = [97 - 99]
/* OBJECT IDENTIFIER (for internal parser use) */
this.grammarObject = 'grammarObject';
/* RULES */
this.rules = [];
this.rules[0] = {name: 'AnBnCn', lower: 'anbncn', index: 0, isBkr: false};
this.rules[1] = {name: 'Prefix', lower: 'prefix', index: 1, isBkr: false};
this.rules[2] = {name: 'ConsumeAs', lower: 'consumeas', index: 2, isBkr: false};
this.rules[3] = {name: 'AnBn', lower: 'anbn', index: 3, isBkr: false};
this.rules[4] = {name: 'BnCn', lower: 'bncn', index: 4, isBkr: false};
/* UDTS */
this.udts = [];
/* OPCODES */
/* AnBnCn */
this.rules[0].opcodes = [];
this.rules[0].opcodes[0] = {type: 2, children: [1,3,4]};// CAT
this.rules[0].opcodes[1] = {type: 12};// AND
this.rules[0].opcodes[2] = {type: 4, index: 1};// RNM(Prefix)
this.rules[0].opcodes[3] = {type: 4, index: 2};// RNM(ConsumeAs)
this.rules[0].opcodes[4] = {type: 4, index: 4};// RNM(BnCn)
/* Prefix */
this.rules[1].opcodes = [];
this.rules[1].opcodes[0] = {type: 2, children: [1,2]};// CAT
this.rules[1].opcodes[1] = {type: 4, index: 3};// RNM(AnBn)
this.rules[1].opcodes[2] = {type: 7, string: [99]};// TLS
/* ConsumeAs */
this.rules[2].opcodes = [];
this.rules[2].opcodes[0] = {type: 3, min: 0, max: Infinity};// REP
this.rules[2].opcodes[1] = {type: 7, string: [97]};// TLS
/* AnBn */
this.rules[3].opcodes = [];
this.rules[3].opcodes[0] = {type: 2, children: [1,2,4]};// CAT
this.rules[3].opcodes[1] = {type: 7, string: [97]};// TLS
this.rules[3].opcodes[2] = {type: 3, min: 0, max: 1};// REP
this.rules[3].opcodes[3] = {type: 4, index: 3};// RNM(AnBn)
this.rules[3].opcodes[4] = {type: 7, string: [98]};// TLS
/* BnCn */
this.rules[4].opcodes = [];
this.rules[4].opcodes[0] = {type: 2, children: [1,2,4]};// CAT
this.rules[4].opcodes[1] = {type: 7, string: [98]};// TLS
this.rules[4].opcodes[2] = {type: 3, min: 0, max: 1};// REP
this.rules[4].opcodes[3] = {type: 4, index: 4};// RNM(BnCn)
this.rules[4].opcodes[4] = {type: 7, string: [99]};// TLSThe toString() function will display the original grammar file(s) that produced these opcodes.
this.toString = function toString(){
let str = "";
str += ";\n";
str += "; text book example of a phrase which\n";
str += "; cannot be described with a context-free grammar\n";
str += "; but can be described using syntactic predicates\n";
str += ";\n";
str += "AnBnCn = &Prefix ConsumeAs BnCn\n";
str += "Prefix = AnBn \"c\"\n";
str += "ConsumeAs = *\"a\"\n";
str += "AnBn = \"a\" [AnBn] \"b\"\n";
str += "BnCn = \"b\" [BnCn] \"c\"\n";
return str;
}
}